Handle.



. Plainville, Connecticut, have invented anewthe handle grip and saidKENKTYD KNUJDSUN, OFJPLAINWILLE TRJEC MANUFACTURING- '00.,

CUNNECTIGUT.

counncricur, or r airman, co

i tpeciflcation of Letters Patent, a Patpmtgfl dimly stance in run,"lLJLtUMHUtJL annencrrcn'r, a conronn'rroir or Application filedDecember 21, W17. Sendai It 0. 2%,2952.

To all whom it may concern." a

Be it known that l, litnun lliunoson, a subject of the King of Denmark,residing at and useful Handle, is a specification.

My invention relates to an improved handle, and consists in providing anovel means of connection between the handle grip usually made of wood,and the metallic core the outer end of which may be of any suitableformation, but which in this particular instance is threaded whereby thehandle may of which the following be secured to the thing to which thehandle is to be connected by means of a nut.

The object of the invention is to. provide an'improved means ofconnection between metallic core which decreases materially the chanceof splitting the former when the latter is inserted, and by Which aneffective permanent connection between said, parts may be provided;

vlln the drawings:

Figure l is a longitudinal section of the assembled handle grip and thecore, the

same being relatively enlarged.

lFig. 2 is a side elevation of the core. v ll ig. dis a cross section ofthe core on the line tar-a: of Fig, 2.

Fig. d is a side elevation of the core viewed from a plane at rightangles to the plane of Fig. 2.

1 represents the main body of the handle grip which may be of anysuitable design, and which is provided with a longitudinal boreextending partially through the same. 2 is the core in the form of ametallic bar of a diameter bore of the grip 1.. As will be seen, thecore is of substantially the same diameter throughout, and is blunt atits inner end so be driven full depth into the bore, if desired, withoutdanger of splitting. O n one side of the metallic core are a series ofspurs 3--3 arranged in line and formed by cutting into the metal of thecore obliquely, so as to give to each spur a lip formation, that is tosay, ,a form in which the spur 1s of greater length than thickness,

adapted to snuglyfit in, the' spurs 4P4 may set or series is prefof woodwill not be unnecessarilg is driven home erably arranged in individualspurs of the other set. The major portion of the surface of the core 2is smooth, so that when the core is driven in, the surrounding wall cutordey the arspurs shown, when the core it will be impossible to eithertwist the same within the grip or withdraw the same therefrom, since thepitch of each of the spurs is such as to prevent both rotary andlongitudinal movement. lln the preferred form, the spurs are formed onlyon one side of the core 2, since if the core partalres of a partial turnas it is driven in, and as would be the tendency because of the spiralarrangement of the spurs, the said spurs will encounter only solid woodon said partial. turn, so that when the core is fully seated it willedectively resist the separation of the grip therefrom. llt will beunderstood of course that after the core is fully seated, thetemporarily displaced wood of the surrounding wall will tend to swelland fill the spaces adjacent to the spurs. 5 represents the conventionalferrule which may be applied at the inner end of the handle l[ havefound that a handle constructed formed. it is apparent that rangementof.

as above is of particular value in connection with electric switches,for instance, of the lrnife switchtype wherein the handle is connectedto a cross bar by means of a nut. Although the handleconstruction hasparticular utility in connection with the switch ,it should beunderstood that l do not care to limit its use thereto.

What ll claim is: i

l. ][n a handle of the character described, a grip having a longitudinalbore therein and a core comprising a metallic bar of a diameter closelyfitting saidbore and provided with a series of outstanding ribs havingabrupt upper faces and sharpened outer lull rated outstanding ribsextending on. an inh ll tltl

lit

a core comprising a metallic bar of a let cline to the axis'of the coreand a second series of longitudinally separated outstanding tie ribsextending on an incline to the axis of the core and in line with theinclined ribs of the first set to thereby constitute in efiectextensions of said first set of. inclined ribs. 5 3 In a handle of thecharacter described, a grip havinga longitudinal bore therein and a corecomprising a metallic bar of a diameter closely fitting said bore andprovided on one side only thereof, with two series of longitudinallyseparated outstanding ribs inclined to the axis of the core and havingcurved sharpened outer cutting edges and abrupt upper faces for holdingengagement in the material of the grip.

KNUD KNUDSON.

